102102109957 has 2 divisors, whose sum is σ = 102102109958. Its totient is φ = 102102109956.

The previous prime is 102102109937. The next prime is 102102110009. The reversal of 102102109957 is 759901201201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99180275041 + 2921834916 = 314929^2 + 54054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102102109957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102102109927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51051054978 + 51051054979.

It is an arithmetic number, because the mean of its divisors is an integer number (51051054979).

Almost surely, 2^102102109957 is an apocalyptic number.

It is an amenable number.

102102109957 is a deficient number, since it is larger than the sum of its proper divisors (1).

102102109957 is an equidigital number, since it uses as much as digits as its factorization.

102102109957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 37.

The spelling of 102102109957 in words is "one hundred two billion, one hundred two million, one hundred nine thousand, nine hundred fifty-seven".